220111200121 has 2 divisors, whose sum is σ = 220111200122. Its totient is φ = 220111200120.

The previous prime is 220111200109. The next prime is 220111200157. The reversal of 220111200121 is 121002111022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134751397225 + 85359802896 = 367085^2 + 292164^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111200121 - 2²⁹ = 219574329209 is a prime.

It is not a weakly prime, because it can be changed into another prime (220111200521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055600060 + 110055600061.

It is an arithmetic number, because the mean of its divisors is an integer number (110055600061).

Almost surely, 2^220111200121 is an apocalyptic number.

It is an amenable number.

220111200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111200121 is an equidigital number, since it uses as much as digits as its factorization.

220111200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220111200121 its reverse (121002111022), we get a palindrome (341113311143).

The spelling of 220111200121 in words is "two hundred twenty billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".